Selected images from a set of transparent playing cards.
When held to a light source, an image with a proverb can be seen.
Unknown maker, but likely US, circa 1870.
See all cards here: beinecke.library.yale.edu/dl_crosscollex/getSETS.asp?ITEM=2039620

A deck of etched, printed, hand-colored playing cards created by the artist Nicholas Kahn while a student at Washington University in St. Louis. Missouri.
The Story of Hextor, Clifford, Duncan, and Serge unfolds within . . . Decifer the sordid tale while engaging in poker, hearts or gin . . . Scenes of intimate pain, extraordinary desire.